Pulley



(No Model.)

G. s. LONG.

v PULLBY.' No. 285,635. Patented Sept. 25, 1883.

N. vz'rcns, Pho'o-Lnhngnpher. Washmgwn. u. c.

NITED- STATES PATENT Gaston.

GEORGE S. LONG, OF HARTFORD, CONNECTICUT.

PULLEY.

SPECIFICATION forming part of Letters Patent No. 285,635, datedSeptember 25, 1883.

I Application filed October 18, 1882. (No model.)

of the one part relatively to the other under any circumstances by beingtongued and grooved, or perhaps it should be termed joggled, together.At the place where the wheel or pulley divides, the two parts of thearms v are joined by yokes, which firmly embrace and secure them withoutthe weakening whichwould be caused by making holesto insert bolts.

The following is a description of what I consider the best means ofcarrying out the in vention.

The accompanying drawings form a part of this specification.

Figure 1 is a side View, showing the construction when the pulley ismade in two entirely separable parts or halves. Fig. 2is a sideelevation, showing a form in which the pulley is partly separable.Either of these forms allows the pulley to be conveniently applied andremoved from a shaft. Fig. 3 is a perspective view,showing the joint orjunction of the peripheral metal open. Fig. 4 is an edge view, showingthe same closed. Fig. 5 is a perspective view, showing a modification.

Similar letters of reference indicate corresponding parts in all thefigures.

A is a shaft, and a a splined groove or keyseat thereina B is thecast-iron hub; G, the

' several peculiarly-bent bars which form the arms, and D the thin widemetal which forms the periphery.

In Fig. l the hub is made in two parts, joined by stout bolts and nutsE. A key-seat, 1), matching to the key-seat a in the shaft, is adaptedtoreceivea spline-key, G, fixing the hub firmly on the shaft.

The bars 0 are accurately bent by hand or bymachinery. In my experimentsI have used bars of half-round or nearly half-round section, and giventhem the proper form by applying them by hand around a carefullycastinto the hub should be bent a little inward,

especially those ends which come close to the joint where the two halvesof the hub join each other. These ends are previously heated and tinned,and, being placed in the mold in proper position, on pouring the castingfor the hub B, are embraced and welded or strongly and permanentlyunited thereto.

The arms of the wheel, each formed of the adjacent portions of two ofthe bars 0, applied with their flat faces together, are permanentlyunited, except along the line where the two halves separate. united byremovable yokes H with cross pieces H and nuts H These yokes are made alittle narrower than the full width of the bars 0, and the latter arenarrowed a little, by a file or other suitable tool, at the points wherethe yokes are to apply. This aids to determine the places for the yokesand holds them against displacement. The junctions of the bars 0 C toconstitute the other arms may be effected by riveting, or they may beunited simply by their union with the hub and periphery, re spectively.

The curved portions of the several bars 0 are united to the periphery Dby riveting. At the points where the ends of the peripheral sheets D Dabut together, especial care is taken to insure and maintain an exactcoincidence of position. The metal is provided of sufficient length toproject somewhat beyond the mean line of junction, and is notched or joggled and beveled, so that each part will brace the other very firmly.Referring to Figs. 3 and 4, the portion of each which projects beyondthe mean line is marked D. The corre- Along this line they are spondingrecess in the opposite portion which matches thereto is marked D Theends of these portions are beveled, certain portions of each end beingbeveled inward, and other porwheel to move with it.

In the form shown in Fig. 2 the periphery is in a single piece; but thehub and arms are capable of separating. The periphery being made ofsteel, or hard and elastic iron, with an opening coinciding with anopening between the two halves of the interior work, it may be sprungopen to be applied upon or to be removed from the shaft. The ends may beequipped as shown in Figs. 3 and 4, and the two halves may be fastenedby yokes and bolts, as above described. The yoke on one side may bedispensed with in small and light pulleys, the junction 011 that sidebeing maintained by the continuity of the peripheral metal D.

The proper degree of crown on the exterior of the pulley is attained byrolling the steel or iron D in properly-formed rolls, so as to producethe required swell, by making the mid dle thicker than the edges. Theinner face of each peripheral piece D is a perfect cylinder. Theexterior face is swelled. The edges, which are likely to come rough fromthe rolling-mill, are finally removed by turning or other means. Thewhole or any portion of the entire outer surface may be coated with anyrequired paint, paper-stock, or other surfacing material. I prefer forgeneral purposes a steel surface highly polished.

My pulleys may and adapted for various conditions in regard to strainsand velocities.

By the employment of the yokcs H, I am able to unite the wheel verystrongly at a point near the periphery, and avoid weakening the bars byproducing any holes therein.

be made of various sizes Instead of the peculiar joint described for thejunctions of the peripheries, the ends of the sheets may be finishedsquarely, and on the inner face of each end maybe riveted toothed platesD*, so placed that the end of the sheet D shall come over the mid-lengthof each tooth. In other words, each tooth lies with its root against theinterior of the piece D to which it is riveted, and with its pointprojecting beyond and lying against the inner face of the opposite pieceD. When the parts thus equipped are applied together, the point of eachtooth matches into the recess between the roots of the teeth in theopposite piece D. This modification is shown in Fig. 5.

Although I have referred to this wheel simply as a pulley, by which willbe generally understood a device to give or receive motion by a belt, Iconsider it also useful for carriagewheels, wheelbarrow-wheels, and forvarious other uses.

I consider the yokes H important in assisting to hold the partstogether, and thus relieve the other fastening devices.

I claim as my invention- The pulley herein described, having the hub B,the barsO, bent in such manner that the arms of each bar form one-halfof each spoke, while the intermediate part supports the rim D, the saidpulley being made in two parts, and the rim D having interlocking pointsand recesses D D and the semicircular parts being locked together bymeans of threaded yokes H, plates H, and nuts 1-1 the whole arranged,constructed, and combined to operate as and for the purposes set forth.

In testimony whereof I have hereunto set my hand, at New York city, this22d day of September, 1882, in the presence of two sub: scribingwitnesses.

G. S. LONG.

\Vitnesses:

THOMAS D. STETSON, H. A. JonNsToNn.

